Holographic Diffusive Optical Elements for Clear Myopia Control

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Solution Overview

Problem

Existing optical lenses with diffusive elements face issues such as rough surface texture, parasite diffusion, loss of contrast, and aesthetic degradation, which compromise both myopia control effectiveness and visual performance.

Innovation Solution

The use of holographic diffusive elements with spatial variations of refractive index greater than 0.001 at a distance less than 30 μm, allowing selective scattering of light towards predetermined directions, maintaining aesthetic appeal while enhancing myopia control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional diffusive elements are used to slow down myopia progression, then myopia control effectiveness is improved, but surface roughness increases and aesthetic appeal deteriorates

Engineering Contradiction:

Improvemyopia control effectivenessVSAvoidsurface roughness

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The patent replaces mechanical surface protrusions with holographic optical elements that use interference patterns to create diffusive effects. The holographic diffusive element uses spatial variations of refractive index (greater than 0.001 at a distance less than 30 μm) to scatter light without creating visible surface roughness, thereby maintaining aesthetic appearance while achieving myopia control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention changes the fundamental parameter of light diffusion from surface-level mechanical scattering to subsurface optical interference. By controlling the spatial variation of refractive index within the lens material rather than modifying surface geometry, the patent achieves diffusive effects without the aesthetic penalties of surface roughness.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If diffusive elements are added to control myopia, then myopia progression is slowed, but visual clarity and contrast are reduced

Engineering Contradiction:

Improvemyopia control effectivenessVSAvoidvisual contrast

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The holographic diffusive element is positioned specifically in the peripheral zones of the lens while leaving the central optical zone clear. This local application ensures that myopia control is achieved through peripheral light diffusion without interfering with central visual clarity and contrast.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses holographic interference patterns as an intermediary mechanism that selectively diffuses light. The spatial variations of refractive index act as a controlled mediator that scatters peripheral light to create myopia control effects while preserving the optical quality needed for clear vision.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If diffusive elements are used to create blurred images for myopia control, then myopia progression is slowed, but parasite diffusion and stray light increase

Engineering Contradiction:

Improvemyopia control effectivenessVSAvoidparasite diffusion

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent replaces uncontrolled mechanical diffusion with precisely engineered holographic optical elements. The interference-based diffusive pattern provides controlled light scattering that achieves myopia control while minimizing stray light and parasite diffusion through the lens.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The holographic diffusive elements provide controlled light diffusion, improving visual comfort and reducing myopia progression without compromising visual clarity or aesthetics.

Implementation Method 1

allowing selective scattering of light towards predetermined directions

Methodology Applied

Scientific EffectLight scattering: Scattering

Implementation Method 2

spatial variations of refractive index of said holographic diffusive element

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS12436322B2Optical element comprising at least one holographic diffusive element

Publication Date: 2025.10.07 ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)

AI summary

An optical element is configured to be worn in front of an eye of a wearer. The optical element has two main surfaces and includes at least one holographic diffusive element having diffusive properties resulting from spatial variations of refractive index of said holographic diffusive element. The spatial variation of refractive index is greater than 0.001 at at least one given wavelength, on a distance less than 30 μm. An optical equipment includes the optical element and methods for recording a holographic medium onto an optical lens.